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Various communications take place in a cluster, with their connections requiring specific ports being opened in the firewall. The following table represents our situation.
| Node | Open portsPort |
|---|---|
| wifimon-node{1,2,3}.example.org | 9200/tcp, 9300/tcp |
| wifimon-kibana.example.org | 9200/tcp, 9300/tcp, 5601/tcp |
| wifimon-logstash.example.org | 5044/tcp |
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